Unallocated
It's your internal Hard Drive or the amount of space partitioned for your operating system on that hard drive
Disc = DVD or CD or Hard disk?? If its a DVD or CD then the chances are it has been formatted incorrectly. If its a hard disk then it probably has not been partitioned correctly or the disk partition is damaged, or the drive has not been formatted correctly
basic disk
disk By default, 'C' denotes a partition of your hard disk drive (given that it has been partitioned) in which windows and its associated system files are stored. C is known as the Local Disk Drive.
Unallocated space is space that has not been assigned to a partition.
No. Operating systems need the system to be formatted / partitioned in order to properly arrange and store their data on the disk.
Yes, it must partitioned and formatted.
No. File systems can become "fragmented", meaning that not all space is allocated contiguously. When a file is deleted, the space it occupied is marked as being available for future use. When a new file is created, the first available free space is used before free space elsewhere on the disk.
A low-level format is the process that marks the location of tracks and sectors on a disk. A disk cannot be partitioned or formatted until a low-level format is completed.
Gateway recovery disks are created for use as a backup to a Gateway System Recovery solution. Gateway System Recovery involves creating a partitioned area of the hard drive in which vital system programs are stored. In case the partitioned area becomes corrupted or inaccessible, a recovery disk can be used to reload the software necessary to restore the system.
Compressed files are used to save disk space.
It resides in the Disk(hard disk).